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Request Receipt
Request Receipt - Request receipts for messages you create...
Entourage Read Receipt
Script for detecting the DNT header in incoming messages and sending back a standards-compliant read receipt...
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New Return Receipt Handler for ThunderBird
A Thunderbird add-on that offers your different possibilities to manage the receipt responses...
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Return Receipt Toolbar Button for Thunderbird
Firefox add-on that lets you add receipt request much easier....
Simple Validation
Library for retrofitting UI validation to swing applications...
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GWT Validation Framework
GWT Validation Framework based on the JSR-303...
W3C (X)HTML Validation
A Firefox add-on that provides you quick access to a W3C markup validation service...
GWT Validation Library
Validation library for the Google Web Toolkit...
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Java Validation Framework
Java based validation framework...
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NRG Address Validation
NRG Address Validation provides integrated address management inside of FileMaker Pro...
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Tighten Pro
It allows you to add a complete robust App Store implementation to your own app....